The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 02, 1999
Filed:
Feb. 21, 1996
Rudy Papajewski, deceased, late of Stutensee, DE;
Gerd Papajewski, Stutensee, DE;
AMF Reece, Inc., Mechanicsville, VA (US);
Abstract
A looper drive assembly for a buttonhole sewing machine includes a long arm which is driven by a double cam, followers and an oscillating plate at one end and the arm generally reciprocates longitudinally. V-shaped plates are pivoted at a second end of the arm. Ends of the V-shaped plates are connected to rocking links which carry the looper needles. The links are pivoted on shafts and support the V-shaped plates and the second end of the arm. As the arm reciprocates, the V-shaped plates swing, pull and push lower ends of the link and oscillate the links around shafts for alternating engagement of the looping needles with thread carried through a fabric by a main needle.